// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

syntax = "proto3";

package google.cloud.conformance.storage.v1;

import "google/protobuf/timestamp.proto";

option csharp_namespace = "Google.Cloud.Storage.V1.Tests.Conformance";
option java_package = "com.google.cloud.conformance.storage.v1";
option java_multiple_files = true;
option go_package = "google/cloud/conformance/storage/v1";

message TestFile {
  repeated SigningV4Test signing_v4_tests = 1;
  repeated PostPolicyV4Test post_policy_v4_tests = 2;
  repeated RetryTest retry_tests = 3;
}

enum UrlStyle {
  PATH_STYLE = 0;
  VIRTUAL_HOSTED_STYLE = 1;
  BUCKET_BOUND_HOSTNAME = 2;
}

message SigningV4Test {
  string fileName = 1;
  string description = 2;
  string bucket = 3;
  string object = 4;
  string method = 5;
  int64 expiration = 6;
  google.protobuf.Timestamp timestamp = 7;
  string expectedUrl = 8;
  map<string, string> headers = 9;
  map<string, string> query_parameters = 10;
  string scheme = 11;
  UrlStyle urlStyle = 12;
  string bucketBoundHostname = 13;
  string expectedCanonicalRequest = 14;
  string expectedStringToSign = 15;
  string hostname = 16;
  string clientEndpoint = 17;
  string emulatorHostname = 18;
  string universeDomain = 19;
}

message ConditionalMatches {
  repeated string expression = 1;
}

message PolicyConditions {
  repeated int32 contentLengthRange = 1;
  repeated string startsWith = 2;
}

// Specification documentation is located at:
// https://cloud.google.com/storage/docs/authentication/signatures

message PolicyInput {
  // http or https
  string scheme = 1;
  UrlStyle urlStyle = 2;
  string bucketBoundHostname = 3;
  string bucket = 4;
  string object = 5;
  int32 expiration = 6;
  google.protobuf.Timestamp timestamp = 7;
  /*
    fields with strict equivalence which are added into
    PolicyOutput.expectedDecodedPolicy to generate the
    signature.
    Expectations
    E.1: Order them in lexigraphical order so it's the
    signature can be verified across different language
    implementations.
  */
  map<string, string> fields = 8;
  PolicyConditions conditions = 9;
}

message PolicyOutput {
  string url = 1;
  map<string, string> fields = 2;
  /*
    Expectations
    E.1: PolicyInput.fields must be prepended to form expectedDecodedPolicy
    for consistent result across languages. Ordering doesn't matter to the
    service but the decision is made to make it easier to conform implementations
    in implementation.
    Example:
    # Step 1
    PolicyInput.fields has:
    {
      "content-disposition":"attachment; filename=\"~._-%=/é0Aa\"",
      "content-encoding":"gzip",
      "content-type":"text/plain",
      "success_action_redirect":"http://www.google.com/"
    }
    # Step 2
    The expectedDecodedPolicy before prepending the PolicyInput.fields
    would look like this:
    {
      "conditions":[
        ...prepend here in the same order provided in PolicyInput.fields...
        {"bucket":"bucket-name"},
        {"key":"test-object"},
        {"x-goog-date":"20200123T043530Z"},
        {"x-goog-credential":"test-iam-credentials@dummy-project-id.iam.gserviceaccount.com/20200123/auto/storage/goog4_request"},
        {"x-goog-algorithm":"GOOG4-RSA-SHA256"}
      ],
      "expiration":"2020-01-23T04:35:40Z"
    }
    # Step 3
    Then expectedDecodedPolicy should prepends PolicyInput.fields in
    the same order to PolicyOutput.expectedDecodedPolicy `conditions` key.
    {
      "conditions":[
        {"content-disposition":"attachment; filename=\"~._-%=/é0Aa\""},
        {"content-encoding":"gzip"},
        {"content-type":"text/plain"},
        {"success_action_redirect":"http://www.google.com/"},
        {"bucket":"bucket-name"},
        {"key":"test-object"},
        {"x-goog-date":"20200123T043530Z"},
        {"x-goog-credential":"test-iam-credentials@dummy-project-id.iam.gserviceaccount.com/20200123/auto/storage/goog4_request"},
        {"x-goog-algorithm":"GOOG4-RSA-SHA256"}
      ],
      "expiration":"2020-01-23T04:35:40Z"
    }
  */

  string expectedDecodedPolicy = 3;
}

message PostPolicyV4Test {
  string description = 1;
  PolicyInput policyInput = 2;
  PolicyOutput policyOutput = 3;
}

/*
 ------------------------------------------------------------------------------
  Data types for retry conformance tests
 ------------------------------------------------------------------------------
*/

message RetryTests {
  repeated RetryTest retryTests = 1;
}

// A list of instructions to send as headers to the GCS emulator. Each
// instruction will force a specified failure for that request.
message InstructionList {
  repeated string instructions = 1;
} 

// Test resources that are necessary for a method call. For example,
// storage.objects.get would require BUCKET and OBJECT.
enum Resource {
  BUCKET = 0;
  OBJECT = 1;
  NOTIFICATION = 2;
  HMAC_KEY = 3;
}

// A particular storage API method and required resources in order to test it.
// Methods must be implemented in tests for each language.
message Method {
  string name = 1;  // e.g. storage.objects.get
  repeated Resource resources = 2;
  string group = 3; // e.g. storage.resumable.upload
}

// Schema for a retry test, corresponding to a single scenario from the design
// doc.
message RetryTest {
  // Scenario number
  int32 id = 1;

  // Human-readable description of the test case.
  string description = 2;

  // list of emulator instruction sets.
  repeated InstructionList cases = 3;

  // List of API methods to be tested.
  repeated Method methods = 4;

  // Whether a precondition is provided (for conditionally-idempotent methods
  // only).
  bool preconditionProvided = 5;

  // Whether we expect the method calls to eventually succeed after the client
  // library retries.
  bool expectSuccess = 6;
}